function popup(url,width,height)
{
	var name = "PopUp";
	datum = new Date();
	timestamp = datum.getTime();

	name = "PopUp"+timestamp;
	
	if (width == null) width=620;
	if (height == null) height=420;

	leftpx=200;
	toppx=200;

	if (width == 9999)
		{
		width=screen.availWidth;
		leftpx=0;
		}
	if (height == 9999)
		{
		height=screen.availHeight;
		toppx=0;
		}

	Fenster = window.open(url,name,"width="+width+",height="+height+",left="+leftpx+",top="+toppx+",toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes");
	Fenster.focus();
}